EP3717936A1 - Système de collecte et de distribution des données capteurs dans une antenne acoustique linéaire remorquée - Google Patents
Système de collecte et de distribution des données capteurs dans une antenne acoustique linéaire remorquéeInfo
- Publication number
- EP3717936A1 EP3717936A1 EP18808008.9A EP18808008A EP3717936A1 EP 3717936 A1 EP3717936 A1 EP 3717936A1 EP 18808008 A EP18808008 A EP 18808008A EP 3717936 A1 EP3717936 A1 EP 3717936A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hub
- data
- frame
- input
- rank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/523—Details of pulse systems
- G01S7/526—Receivers
- G01S7/53—Means for transforming coordinates or for evaluating data, e.g. using computers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/003—Transmission of data between radar, sonar or lidar systems and remote stations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
- G01V1/201—Constructional details of seismic cables, e.g. streamers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40169—Flexible bus arrangements
- H04L12/40176—Flexible bus arrangements involving redundancy
- H04L12/40182—Flexible bus arrangements involving redundancy by using a plurality of communication lines
Definitions
- the invention relates to the field of digital acoustic towed acoustic antennas, conventional electro-acoustic technology and more particularly the electronic telemetry systems ensuring the digitization of the signals generated by all the acoustic hydrophones constituting such an antenna and by non-acoustic sensors or "NAS" according to the acronym of the English name "Non Acoustic Sensor” (temperature sensors, immersion, heading, roll / pitch, etc .7) required for signal processing Sonar tracks and their operation.
- NAS non-acoustic Sensor
- the invention relates directly to a method and a system for collecting and distributing sensor data in an electronic telemetry system of a towed linear acoustic antenna.
- a conventional telemetry system of an acoustic antenna generally comprises the following functions:
- antenna synchronization distribution function (antenna top sampling, fast clock, etc.);
- DAU data acquisition function
- analog processing and digitization modules distributed regularly inside an antenna or different antenna sections by following the linear arrangement of the hydrophones (or groups of hydrophones).
- These modules are synchronized by an antenna sync signal from one or more antenna sync modules and fed via antenna power supply modules;
- An antenna data collection function performing the routing of all digitized antenna data to the receiver that performs the treatment generally placed on board the vessel that tows (trailer) the antenna. This function is conventionally performed by
- SUBSTITUTE SHEET (RULE 26) an antenna multiplexing module, synchronized by an antenna sync signal and fed via antenna power supply modules.
- DAU Data Acquisition Unit
- Each DAU 11 transmits on a particular bus 12 the data of the sensors 13 for which it is responsible, these data finally being multiplexed 14 at the antenna head (ie the end connected to the towing vessel) to be transmitted to the onboard receiver.
- each DAU 11 then comprises means enabling it to insert the data produced by the data elements. sensors 13 which it manages on the common data BUS 12.
- the synchro distribution system and data collection functions are implemented in the form of bus 12 and 16, which limits the use of such a configuration to antennas comprising only a few dozen channels. and having a limited acoustic length, non-dedicated ETBF antennas and even less UBF. Indeed, in known manner, the time division multiplexing capability on the same bus is limited by the effects of the length of the line and the number of subscribers on the bus on the bus parameters (bus frequency, spreading symbols and generation inter-symbol interference ).
- the data produced by the different DAUs 11 of the same group are locally multiplexed 32 at the group level and can be transmitted to the receiver via a single bus 12, as shown in FIG. 3.
- the system is thus broken down into N subsystems 31 (for limit the length and the number of subscribers per bus) with the introduction of repeaters to convey the system functions.
- the number of cable links is advantageously reduced.
- the robustness of the system remains mediocre, a critical failure at a subset resulting in a total failure of the data transmission.
- the data produced by the different DAUs 1 1 of the same group 31 are locally multiplexed 32 at the group level and can then be routed through parallel channels (buses) 12 to a multiplexing system 41 placed at the top antenna, as shown in Figure 4.
- the overall system is thus divided into N subsystems (local groups). of N acquisition channels).
- Two adjacent subsystems may optionally be nested to form even and odd data channels.
- the system robustness of such a device is improved due in particular to the redundancy introduced at the data transmission (redundant bus) and at the antenna head.
- the number and type of different objects introduced and the wiring density appear much too important (heavy antenna wiring) for such a structure can be a truly exploitable solution.
- FIG. 5 shows an exemplary architecture, in which subassembly blocks 51 connected in series, subassemblies in which the data of the acquisition units 52 are collected in series by a support module 53, are connected in parallel. and transmitted to the antenna head via a serial data bus 54 common to the other subset of the same block.
- An object of the invention is to propose an alternative solution to existing solutions for collecting the sensor data and to reassemble these data to the antenna head and the on-board receiver.
- Another object of the invention is to provide a solution for both limiting the mass constituted by the cabling network to perform the collection and routing of sonar data, and to have a robust system able to continue operating even in the presence of a plurality of failed acquisition units.
- the subject of the invention is a system for collecting data
- each HUB of rank n (HUB n ) is configured to:
- the method according to the invention may comprise various provisions listed below.
- each HUB comprises a first register bank configured to allow the storage of the sensor data produced at each sampling period, the time necessary to allow their integration with the data frame corresponding to the same period of time. 'sampling.
- each HUB of rank n (HUB n ) is configured such that, if a data stream is present on its first input, said HUB n integrates, at each of the frames. successive ones transmitted by the HUB located immediately upstream (HUB n-1 ) and received on this first input, the synchronous data of said frame produced by the different sensors managed by him, and produces a completed frame which he transmits to the HUB located immediately downstream (HUB n + 1 ) and to the HUB located three ranks downstream (HUB n + 3 ) ⁇
- each HUB of rank n (HUe n ) is configured such that if no data stream is present on its first input, said HUB n integrates, at each successive frames received on its second input, the synchronous data of said frame produced by the various sensors managed by it and produces a completed frame that it transmits to the HUB located immediately downstream (Hu Bn + i ) and the HUB located three ranks downstream (HUB n + 3 ).
- each HUB of rank n (HUB n ) is configured such that if a data stream is present on each of its inputs, said HUB n integrates, each successive frames received by its first input, the synchronous data of said frame produced by the various sensors managed by him and the data produced by the various sensors managed by the n-3 HUB n-3 (HUB n-3 ), collected on the data frame received on its second synchronous input of the data frame received on its first input, and produces a completed frame which it transmits to the HUB located immediately downstream (HUB n + 1 ) and to the HUB located three ranks downstream (HUB n + 3 ) -
- each HUB further comprises a second set of registers configured to allow the storage of the data produced by the n-3 HUB (HUB n-3 ) at each sampling period the time necessary to allow their integration into the data frame corresponding to the same sampling period.
- FIGS. 1 to 5 schematic illustrations relating to systems for collecting and collecting sensor data, known from the prior art
- FIG. 6 a schematic representation of a telemetry system for a towed linear acoustic antenna incorporating the system for collecting and collecting sensor data according to the invention
- FIG. 7 a detailed schematic illustration of the operating principle of the system for collecting and collecting sensor data according to the invention
- Figures 8 and 9 are timing diagrams illustrating the operation of the synchronization mechanism of the sensor data and the data frames within a HUB.
- the antenna data collection system is integrated in a global telemetry system 61, shown schematically in FIG. 6, in which the various acoustic sensors (hydrophones) constituting the antenna, are managed by a set of acquisition modules 62 or HUB.
- Each HUB manages a given group of acoustic sensors and is marked by its rank n which corresponds to the position occupied by the acoustic sensors associated with it.
- the HUBs thus arranged form a chain each HUB being identified by its rank in the chain.
- a hub of rank n is placed in the chain of HUBs between the HUB of rank n-1, located upstream of the HUB in question, that is to say closer to the free end of the antenna (tail antenna) and the HUB of rank n + 1, located downstream of the HUB in question, that is to say closer to the end opposite to the free end of the antenna (antenna head), by which the antenna is towed and communicates with the equipment placed on board the towing vessel.
- each hub also receives synchronization information, via a common synchronization bus 63.
- Each HUB is further supplied with electrical energy by a general power supply loop 64.
- each HUB 62 of rank n receives from Hub of rank n-1, HUB n-1, which precedes it in the chain (ie upstream in the chain), a DATA BUS 65 conveying the frames of digital data corresponding to the signals received by the HUB n-1 on which the latter has inserted the data delivered by the different sensors which it manages.
- each HUB restores on two separate buses 67 and 68 the frames of digital data respectively transmitted by the HUB of rank n-1, HUB n-1 , and by the HUB of rank ni, HUB nor on which it has inserted the data delivered by the various sensors which it manages.
- a main bus which, from the point of view of the collection of sensor data, provides direct series chaining of the HUBs relative to one another; a n-rank HUB being connected by this bus to the rank n-1 HUB which immediately precedes it in the succession of the sensors;
- auxiliary buses which collect the sensor data in a discontinuous manner, a n-rank HUB being chained by an auxiliary bus given to the HUBs of rank n-1 and n + 1.
- the value of the jump i is preferably greater than 1. However, in a preferred embodiment, illustrated in FIGS. 6 and 7, this value is equal to 3. This is called a Leapfrog mechanism of rank 2.
- the following text describes the operating principle of the system for collecting and collecting sensor information according to the invention in the case illustrated by FIGS. 6 and 7, where i is equal to 3 (Leapfrog of rank 2).
- GDS (A), GDS (C) and GDS (D) respectively represent the data flows transmitted to the input of the HUB n by the HUB n-1 and the output streams delivered by the same HUB n respectively to the HUB n + 1 and HUB n + 3 .
- Data_HUB n represents the sensor data collected locally by the HUB n .
- each HuB n is configured to process both the GDS (C) and GDS (D) data transmitted respectively on its input. A data and its data entry B.
- the flow of data finally transmitted will have only one gap: the data produced by the HUB n- 2 will be introduced into the data stream at the level of the HUB n + 1 .
- the loss of data will ultimately only affect the data produced by the HUB n-1.
- the flow of finally transmitted data will ultimately not contain any gaps: the data produced by the HUB n-2 will be introduced into the data stream at the level of the HUB n + 1 and the data produced by the HUB n-1 will be introduced into the data stream at level of the HUB n + 2 (data link 66).
- the disappearance of the data on the input A of the HUB n therefore only leads, in the most unfavorable case (HUB n-1 damage), the absence, in the data streams GDS (C) and GDS (D) of the HUB n + 2 , of data produced by the HUB n-1 .
- This form of implementation therefore provides an increased quality of service compared to the previous form.
- This principle of data collection and reporting according to the invention advantageously allows to confer on a towed linear acoustic antenna, provided with such a system for collecting and collecting sensor data, a fault tolerance that can affect such or such HUBs or data links between such or such HUBs.
- a towed linear antenna equipped with a system for collecting and collecting sensor data according to the invention can continue to operate in a degraded manner, while many of the HUBs that compose it are out of order, provided that there are no more consecutive failed iHubs, i.e., 2 consecutive hubs in the embodiment shown in FIG.
- a n-rank HUB is said upstream of a n + 1 rank HUB if it is located closer to the free end (tail) of the antenna.
- FIGS. 6 and 7 the system for collecting and reporting sensor data according to the invention is described as preferentially implementing a Leapfrog level 2 mechanism. It is well heard here that the implementation of a Leapfrog mechanism of level other than 2 may be considered.
- Leapfrog Level 2 has certain advantages, particularly in comparison with a Leapfrog Level 1 mechanism.
- Leapfrog type 2 mechanism advantageously provides a much better robustness to failures than a Leapfrog type 1, for a limited impact in terms of growth. the density of the wiring needed to collect and retrieve sensor information.
- a configuration Leapfrog Level 2 provides full redundancy in the event of mechanical breaks in different parts of the chain:
- an "Leapfrog N level” configuration will confer on the system an increased fault tolerance of HUBs (fault tolerance of adjacent N HUBs), at the cost of a significant increase in the wiring density (N + 2 wired links maximum interleaved in the case of a configuration "Leapfrog level N", against only 4 links in the case of a configuration "Leapfrog level 2”), which quickly becomes prohibitive in the antenna frame linear towed small diameter.
- a "Leapfrog Level 1" - “Leapfrog Level 2" combination involves the use of 3-input and 3-output HUBs and 6 wired links per antenna section; without improving the robustness of the set compared to a "Leapfrog Level 2" configuration.
- the transmission of the sensor data is of the asynchronous type, based on the implementation of a functional chain involving ADM functions or "Add Drop Mux" according to the Anglo-Saxon denomination, which perform the multiplexing of local data, produced by the various acoustic sensors constituting the antenna.
- each HUB implements an ADM function, whose role is to insert, at the appropriate time, the data produced by the various acoustic sensors attached thereto on the asynchronous data stream that passes through said module.
- This mode of data collection follows a protocol similar to the ATM ("Asynchronous Transfer Module") protocol which is a high speed transmission protocol (i.e. multiple bit rate of 155 Mbps) used in telecommunications systems.
- ATM Asynchronous Transfer Module
- the implemented ADM function retrieves the data transmitted frame by frame, at the rate of the period T eCh of collection of the sensor data, by the HUBs located upstream of the Leapfrog chain to which the HUB in question is connected. .
- FIGS. 8 and 8. 9 The synchronization principle of the HUB data insertion mechanism in the data stream throughout an antenna, as implemented by the system according to the invention, is illustrated by FIGS. 8 and 8. 9.
- the data 81 (samples N per example) created locally in a n-rank HUB (digitizing the signals delivered by the sensors connected to the HUB n ) during a sampling period T N , of duration T eCh , of a current frame 82 (N-frame example) can not be, at best, taken into account by the ADM function of the HUB n considered for insertion into the antenna data stream only from the frame following the current frame (N + 1 frame), the frame N being then devoted to the acquisition of sensor data.
- the Hub can thus deliver the completed data frame 83 thus produced only after the lapse of time 5t n , which thus corresponds to the propagation time of said data frame through the transmission chain constituted by all the HUBs. located upstream of the relevant HUB, from the Tail HUB (HUB 001).
- This double delay therefore determines the moment when a HUB of a given rank is able to insert the acquired sensor data during a given sampling period T N in the corresponding data frame, at which point the sampled data in question must always be available.
- the HUBs of ranks 1 to 63 are able to start delivering to the HUB following a frame data supplemented with their own sensor data, during the sampling period T N which follows the period T N -i during which sensor data has been acquired.
- the HUBs of the ranks 64 to 127 are only able to do it during the period T N + i
- the HUBs of the ranks 128 to 166 are only able to do so during the period T N + 2 -
- each HUB has a battery of buffer registers (Buffer, Buffer_dlyi, ..., Buffer_dly M ) in which the sampled sensor data 81 are stored, rhythm of the period T eCh .
- the same data is thus first stored in the first buffer register (Buffer) and then successively in each of the following buffer registers (Buffer_dlyn).
- the buffer registers of battery thus form a shift register structure that allows, regardless s 0 it the HUB considered to memorize a same data 81 during the period of time necessary to be inserted into the corresponding data frame.
- this interval results from a compromise between the desire to ensure that all the sensor data 81 corresponding to a sampling period T N , are stored for a time sufficient to ensure their availability in time. useful and that these data remain present at the buffer register in which they are accessible, for a time sufficient for the HUB to insert them in the frame 83 to which they correspond.
- the choice of the interval, and thus the number of buffer registers also takes into account the need to limit the number of buffer registers used so as to limit the number of electronic components that the HUB must contain.
- this time interval is chosen equal to half the duration T eCh of a sampling period, so that the storage of the sensor data 81 during three periods of samplings, necessary duration, in this example, for the HUBs located downstream, requires the implementation of a battery of five buffer registers (Buffer, and Buffer_dly1 to Buffer_dly4).
- the HUBs located at the most upstream (HUB 001 to HUB 048) will insert in the N-1 frame the sensor data 83 collected during the period T N- -i, during the period T N , these data being taken at each level. of these HUBs, in the first buffer register (Buffer).
- the most downstream HUBs (HUB 145 to HUB 166) will perform the insertion in the N-1 frame of the sensor data collected during the period T N- -i, during the period T N + 2, these data being taken, at each of these HUBs, in the last buffer register (Buffer_dly4).
- the mechanism described above thus advantageously allows different HUBs constituting the system according to the invention to present a structure and an identical mode of operation, both as regards the securing of the data transmission chain to the antenna head , as regards the synchronization necessary for the insertion of the sensor data, collected at each sampling period, in the data stream which carries out the feedback of the sensor data to the antenna head.
- the same HUB can occupy any place in the HUB chain constituting an antenna.
- the proposed treatment is simple. All data is duplicated in both outputs. Both inputs are scanned continuously and in parallel. If one of the two frames contains erroneous information following a failure in the hub chain, the missing information is retrieved immediately in the other frame.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Signal Processing (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1701251A FR3074304B1 (fr) | 2017-11-28 | 2017-11-28 | Systeme de collecte et de distribution des donnees capteurs dans une antenne acoustique lineaire remorquee |
| PCT/EP2018/082732 WO2019105948A1 (fr) | 2017-11-28 | 2018-11-27 | Système de collecte et de distribution des données capteurs dans une antenne acoustique linéaire remorquée |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3717936A1 true EP3717936A1 (fr) | 2020-10-07 |
| EP3717936B1 EP3717936B1 (fr) | 2025-06-25 |
Family
ID=61750176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18808008.9A Active EP3717936B1 (fr) | 2017-11-28 | 2018-11-27 | Système de collecte et de distribution des données capteurs dans une antenne acoustique linéaire remorquée |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3717936B1 (fr) |
| AU (1) | AU2018377968B2 (fr) |
| FR (1) | FR3074304B1 (fr) |
| WO (1) | WO2019105948A1 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6816082B1 (en) * | 1998-11-17 | 2004-11-09 | Schlumberger Technology Corporation | Communications system having redundant channels |
| US8174403B2 (en) * | 2007-11-30 | 2012-05-08 | Schlumberger Technology Corporation | Methods and apparatus for telemetry and power delivery |
| FR2963127B1 (fr) * | 2010-07-26 | 2013-03-01 | Thales Sa | Reseau a noeuds distribues adapte pour tolerer un nombre donne de pannes de noeuds reseau |
| US9459944B2 (en) * | 2013-10-30 | 2016-10-04 | Pgs Geophysical As | Method and system for streamer redundancy |
-
2017
- 2017-11-28 FR FR1701251A patent/FR3074304B1/fr active Active
-
2018
- 2018-11-27 EP EP18808008.9A patent/EP3717936B1/fr active Active
- 2018-11-27 AU AU2018377968A patent/AU2018377968B2/en active Active
- 2018-11-27 WO PCT/EP2018/082732 patent/WO2019105948A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU2018377968B2 (en) | 2023-11-09 |
| EP3717936B1 (fr) | 2025-06-25 |
| FR3074304B1 (fr) | 2019-10-18 |
| WO2019105948A1 (fr) | 2019-06-06 |
| AU2018377968A1 (en) | 2020-06-11 |
| FR3074304A1 (fr) | 2019-05-31 |
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